To withstand harsh use in the laboratory, e.g. when heat-treating metals, robust insulation with light refractory bricks is necessary. The N 7/H – N 87/H models are a perfect fit to solve this problem. The furnaces can be extended with a variety of accessories, like annealing boxes for operation under protective gas, roller guides, or a cooling station with a quench tank. Even high-performance applications like the annealing of titanium in medical applications can be implemented without the use of expensive and complicated annealing systems.
The ashing furnaces LV 3/11 – LVT 15/11 are especially designed for ashing in the laboratory. A special air intake and exhaust system allows air exchange of more than 6 times per minute. Incoming air is preheated to ensure a good temperature uniformity.
These furnaces are especially used for the assay of precious metals and ashing processes where the insulation and heating must be protected from emerging gasses and vapours. The furnace chamber forms a ceramic muffle which can easily be replaced. The assay furnace is equipped with an integrated exhaust hood above the furnace door for connection to and exhaust sytem.
Autoclave for crazing test of glazed ceramic tiles, maximum
sizes 350×365 mm or 550x650mm, according to UNI EN ISO
10545-11, BSI standard.
Laboratory instrument for the cracking test (micro-cracking of
glaze) on tiles after water-steam, test by the use of a coloured
substance over the glazed surface. The pressurized sampleholder
is all made from stainless steel AISI-304 suitably insulated
with rock-wool, while the supporting frame from steel,
Thanks to the programmable microprocessor the unit can carry
out a serial of standardized cycles in conformity to UNI EN
ISO 10545-11 norm but also custom-wanted cycles as the
user may wish to do.
– Container made all stainless steel AISI-304
– Working cycle standard program according to UNI EN ISO 10545-
11 norm and personalized cycles.
– Max working pressure: 11 bar (183.2º C)
– Electrical heating with minimum inertia
– Cooling by coil water controlled by a solenoid valve
– Cover closing by means of hand small wheels and VITON gasket
Net weight 130 kg.
Supplied tests holding basket in AISI-304.
The chamber furnaces LH 15/12 – LF 120/14 have been trusted for many years as professional chamber furnaces for the laboratory. These furnaces are available with either a robust insulation of light refractory bricks (LH models) or with a combination insulation of refractory bricks in the corners and low heat storage, quickly cooling fiber material (LF models). With a wide variety of optional equipment, these chamber furnaces can be optimally adapted to your processes.
The DTA uses a dynamic measuring principle. This instrument will measure endothermal and exothermal heat flow between the sample and reference (enthalpy).
In general these heat flows are characteristic of chemical or physical changes of the sample. The test sample and an inert reference material are heated simultaneously in the same atmosphere.
Both the sample and reference material temperatures are measured with thermocouples.
Then these 2 thermocouple output voltages are subtracted from one another. There suit is a low voltage signal which is proportional to the endothermal and exothermal reaction.
Endothermic sample reactions absorb heat and exhibit a lower sample temperature when compared to the reference material.
Exothermic reactions produce heat and exhibit a higher sample temperature when compared to the reference material.
Options include operations in vacuum and inert atmospheres
Maximum operating temperatures of 1400°C, 1500°C & 1600°C with chamber
capacities of 3, 8, 15 & 35 litres. These furnaces are heated by powerful silicon
carbide elements located on both sides of the chamber that ensure good thermal
uniformity (silicon carbide elements can withstand the stress of everyday operation and provide good longevity).
Hardwearing refractory brick in chamber entrance and hearth provide good resistance to abrasion whilst elsewhere, lightweight ceramic fibre insulation is used which ensures good energy efficiency and rapid heating. A vertical counterbalanced door keeps hot door insulation away from operator whilst a positive break door safety switch isolates the chamber from the power supply, when the door is opened.
A double skinned construction allows convection air flow to cool the outer case,
conforming to EN61010 safety standard Choice of PID controller or programmers Applications in general industry include sintering alumina, smelt trials and checking Al2O3 content in alumina. Applications in the ceramics industry include disintegration, testing and analysis of cement samples, refractory porosity tests, long term high temperature tests and firing & sintering of ceramic samples. Applications in the semi-conductor industry include annealing silicon, silicon carbide & nitride samples and solid
state synthesis .
The HTF is a range of chamber furnaces with maximum operating temperatures of 1700ºC or 1800°C, and chamber capacities up to 27 litres Powerful MoSi2 elements located on both sides of the chamber ensure good thermal
uniformity and low thermal mass insulation and good element design is used to ensure energy efficiency and rapid heating.
Electrically operated vertical doors keeps hot door insulation away from operator whilst positive break door safety switches isolates chambers from the power supply, when the door is opened Double skinned construction allows fanned air flow to cool the outer case Eight segment programmer and adjustable over temperature protection is fitted as standard, with options for other types
Applications in general industry include sintering alumina, smelt trials and checking Al2O3 content in alumina Applications in the ceramics industry include disintegration, testing and analysis of cement samples, refractory porosity tests, long term high temperature tests and firing & sintering of ceramic samples.
Design: The exterior is constructed from sheet steel finished in easy clean powder coated paint. The interior chamber is made from mild steel coated with aluminium (CLAD) with a stainless steel chamber available as on option. Fitted with fixed shelf runners and removable chrome plated wire grid shelves. The top vent is fitted with a clip to hold a mercury in glass thermometer. The vertical style units are fitted with the controls below the door and the horizontal
style units with the controls fitted on the side are available from 75 litres upwards.
Heating: Heated by incoloy sheathed elements; positioned below the chamber floor for natural convection units and fitted around the fan on the back or side wall of the chamber for mechanical convection units.
Controls: The control systems comprise of a direct reading thermostat and overheat thermostat both with calibrated scales and tamper proof locks. They also include mains switch with indicator and heat and overheat indicators. Options include a microprocessor digital controller with LED display of temperature or an independent LED display for showing temperature on
the thermostatically controlled units. All units supplied with digital controller must have fan circulation.